We have a water distillery using this filter as a post distilling filter. Because we have a whole house filter and a pre-distill filter, the expense can be considerable. Plus we have a Bunk House(I turned my gunsmithing shop into a guest house)now that I am retired and it has a whole house filter also. Our retirement house is 75 miles round trip from a town of any notable size(Brownwood),so buying from Flitersfast.com saves time and $$.I would rate this filter #5 but I have no data to judge against.